Culanikasutta 8.4

8.4

Evaṃ kho, ānanda, tathāgato tisahassimahāsahassilokadhātuṃ sarena viññāpeyya, yāvatā pana ākaṅkheyyā”ti.

That’s how a Realized One could make his voice heard throughout a galactic supercluster, or as far as he wants.”